摘要
通过凝胶含量测定、力学性能试验以及熔体流动性能测试等手段,研究了共混(反应)时间对密炼法和挤出法反应性PP/EPDM共混合金性能的影响及其机理。结果显示,适当延长共混(反应)时间不仅能提高合金中EPDM的交联程度,而且还能使交联EPDM颗粒粒径变小、粒度均匀、在PP连续相中的分布均匀性增加,从而有效地提高该合金的增韧效果及其他力学性能,提高合金的加工流动性。
The effect of blending time on the properties of reactive PP/EPDM alloy was studied via the analysis of gel content, mechanical properties, melt flow behaviour and morphology. The results indicated that properly lengthened blending time not only raised the crosslinking degree of the EPDM in the alloy, but also made diameters of the crosslinked EPDM spheroids become smaller. Even the uniformity of the spheroids size and the distribution homogeneity of the EPDM spheroids in the PP matrix was improved obviously. Therefore, the melt flowability, impact toughness and other mechanical properties of the reactive PP/ EPDM alloy were effectively increased.
出处
《合成树脂及塑料》
CAS
1999年第2期34-39,共6页
China Synthetic Resin and Plastics
关键词
聚丙烯
三元乙丙橡胶
共混
polypropylene
ethylene-propylene - diene terpolymer
blend
alloy
time
reactive
